{"id":"DEBIAN-CVE-2022-48922","details":"In the Linux kernel, the following vulnerability has been resolved:  riscv: fix oops caused by irqsoff latency tracer  The trace_hardirqs_{on,off}() require the caller to setup frame pointer properly. This because these two functions use macro 'CALLER_ADDR1' (aka. __builtin_return_address(1)) to acquire caller info. If the $fp is used for other purpose, the code generated this macro (as below) could trigger memory access fault.     0xffffffff8011510e \u003c+80\u003e:    ld      a1,-16(s0)    0xffffffff80115112 \u003c+84\u003e:    ld      s2,-8(a1)  # \u003c-- paging fault here  The oops message during booting if compiled with 'irqoff' tracer enabled: [    0.039615][    T0] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000f8 [    0.041925][    T0] Oops [#1] [    0.042063][    T0] Modules linked in: [    0.042864][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.17.0-rc1-00233-g9a20c48d1ed2 #29 [    0.043568][    T0] Hardware name: riscv-virtio,qemu (DT) [    0.044343][    T0] epc : trace_hardirqs_on+0x56/0xe2 [    0.044601][    T0]  ra : restore_all+0x12/0x6e [    0.044721][    T0] epc : ffffffff80126a5c ra : ffffffff80003b94 sp : ffffffff81403db0 [    0.044801][    T0]  gp : ffffffff8163acd8 tp : ffffffff81414880 t0 : 0000000000000020 [    0.044882][    T0]  t1 : 0098968000000000 t2 : 0000000000000000 s0 : ffffffff81403de0 [    0.044967][    T0]  s1 : 0000000000000000 a0 : 0000000000000001 a1 : 0000000000000100 [    0.045046][    T0]  a2 : 0000000000000000 a3 : 0000000000000000 a4 : 0000000000000000 [    0.045124][    T0]  a5 : 0000000000000000 a6 : 0000000000000000 a7 : 0000000054494d45 [    0.045210][    T0]  s2 : ffffffff80003b94 s3 : ffffffff81a8f1b0 s4 : ffffffff80e27b50 [    0.045289][    T0]  s5 : ffffffff81414880 s6 : ffffffff8160fa00 s7 : 00000000800120e8 [    0.045389][    T0]  s8 : 0000000080013100 s9 : 000000000000007f s10: 0000000000000000 [    0.045474][    T0]  s11: 0000000000000000 t3 : 7fffffffffffffff t4 : 0000000000000000 [    0.045548][    T0]  t5 : 0000000000000000 t6 : ffffffff814aa368 [    0.045620][    T0] status: 0000000200000100 badaddr: 00000000000000f8 cause: 000000000000000d [    0.046402][    T0] [\u003cffffffff80003b94\u003e] restore_all+0x12/0x6e  This because the $fp(aka. $s0) register is not used as frame pointer in the assembly entry code.  \tresume_kernel: \t\tREG_L s0, TASK_TI_PREEMPT_COUNT(tp) \t\tbnez s0, restore_all \t\tREG_L s0, TASK_TI_FLAGS(tp)                 andi s0, s0, _TIF_NEED_RESCHED                 beqz s0, restore_all                 call preempt_schedule_irq                 j restore_all  To fix above issue, here we add one extra level wrapper for function trace_hardirqs_{on,off}() so they can be safely called by low level entry code.","modified":"2026-09-01T20:04:51.590690254Z","published":"2024-08-22T02:15:08.267Z","upstream":["CVE-2022-48922"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-48922"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48922.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48922.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48922.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}